Konica Minolta QMS magicolor CX Reference - Manual (Page 106)

Interface
Daughterboards
QMS magicolor CX Reference Guide 2-32
4 Using the two screws you removed in step 2, fasten the new
interface plate to interface card to hold the card in place.
5 Follow the instructions in “Replacing the Controller Board”
on page 21, being careful to eliminate static electricity.
6 If your interface kit came with an external power supply box,
attach it to the round connector next to the interface port;
then connect the box to a power cord and plug the power
cord into an electrical outlet.